Agilent/Keysight N2805A

The Keysight N2805A is a 200 MHz high-voltage differential probe engineered for precision measurement of differential signals in demanding test environments. With a 5 m cable and AutoProbe interface compatibility, it delivers direct connection to Keysight oscilloscopes without external power or configuration overhead. The probe's 50:1 attenuation ratio and >70 dB CMRR at 1 MHz enable clean signal isolation even in high common-mode noise conditions, making it ideal for power electronics and high-speed digital characterization.

Technical Specifications

• Bandwidth: 200 MHz


• Rise Time (Calculated): 1.75 ns


• Attenuation Ratio: 50:1


• Differential Input Resistance: 4 MΩ


• Differential Input Capacitance: 4 pF


• Input Impedance: 4 MΩ || 4 pF


• Common-Mode Rejection Ratio (CMRR): >70 dB at 1 MHz


• Maximum Differential Operating Voltage: ±100 V (DC + peak AC), ±100 Vrms


• Cable Length: 5 m


• Lead Length: 0.39 m


• Operating Temperature Range: -10 to 40°C


• Measurement Category: CAT II

Key Features

• AutoProbe interface eliminates external power supply requirements


• Adjustable zero offset via included trimmer tool


• Extended 5 m cable for remote measurement points


• 30 cm extension leads with built-in damping resistor


• Comprehensive accessory kit: alligator clips, hook clips, pincer clips, browser tips, and color-coded identification rings

Typical Applications

• High-speed power measurements (switching power devices, DC-DC converters, class D amplifiers)


• Vehicle bus signal acquisition


• High-speed digital system characterization


• Measurements requiring extended cable reach

Compatibility & Integration The N2805A operates with InfiniiVision 4000 X-Series (SW v4.0+), Infiniium S-Series, 9000 Series, and 90000 Series oscilloscopes. Compatible with any oscilloscope featuring 50 Ω AutoProbe-interface channel inputs.